title: Solvent-accessible surface area: How well can be applied to hot-spot detection?
abstract: A detailed comprehension of protein-based interfaces is essential for the rational drug development. One of the key features of these interfaces is their solvent accessible surface area profile. With that in mind, we tested a group of 12 SASA-based features for their ability to correlate and differentiate hot- and null-spots. These were tested in three different data sets, explicit water MD, implicit water MD, and static PDB structure. We found no discernible improvement with the use of more comprehensive data sets obtained from molecular dynamics. The features tested were shown to be capable of discerning between hot- and null-spots, while presenting low correlations. Residue standardization such as rel SASAi or rel/res SASAi , improved the features as a tool to predict ΔΔGbinding values. A new method using support machine learning algorithms was developed: SBHD (Sasa-Based Hot-spot Detection). This method presents a precision, recall, and F1 score of 0.72, 0.81, and 0.76 for the training set and 0.91, 0.73, and 0.81 for an independent test set.
authors.affiliation: REQUIMTE/Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre s/n, 4169-007, Porto, Portugal.
authors.forename: João M
authors.initials: JM
authors.lastname: Martins
authors.forename: Rui M
authors.initials: RM
authors.lastname: Ramos
authors.forename: António C
authors.initials: AC
authors.lastname: Pimenta
authors.forename: Irina S
authors.initials: IS
authors.lastname: Moreira
mesh_terms: D019295:Computational Biology / Q000379:methods*; D030562:Databases, Protein; D056004:Molecular Dynamics Simulation; D011506:Proteins / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry*; D060388:Support Vector Machine; D013499:Surface Properties; D013816:Thermodynamics
chemical_list: D011506:Proteins; D012997:Solvents
keywords: computational alanine scanning mutagenesis; feature based algorithms; hot-spot; solvent accessible surface area; support vector machine